package com.itcast.reggie.config;


import com.itcast.reggie.mapper.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
@Slf4j

public class WebMvcConfig extends WebMvcConfigurationSupport{



   /* @Override
    protected void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        //静态资源自动管理
        configurer.enable();
    }
*/

    /**
     * 设置静态资源映射
     *
     * @param registry
     */
    @SuppressWarnings("AlibabaRemoveCommentedCode")
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/static/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/static/front/");
    }

    /**
     * 扩展mvc框架的消息转换器
     * 可以用给id加@JsonSerializeCusing 注解达到同样的效果
     * 但是,不管全局,要每一个要序列化的都去加,很烦
     *
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0, messageConverter);
    }
}
